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Unit 11: Rank Correlation Method

11.4 Key-Words Notes

1. Rank correlation : In statistics, a rank correlation is the relationship between different rankings
of the same set of items. A rank correlation coefficient measures the degree
of similarity between two rankings, and can be used to assess its significance.
11.5 Review Questions

1. Define rank correlation. Derive formula for correlation coefficient.
2. If the difference of rank in each pair is zero, show that the rank correlation coefficient is + 1.
3. State the merits and demerits of rank correlation method.
4. Give the features of spearman’s coefficient of correlation.
Answers: Self-Assessment

1. (i) T (ii) F (iii)T (iv) F (v) T
11.6 Further Readings

1. Elementary Statistical Methods; SP. Gupta, Sultan Chand & Sons,
New Delhi - 110002.
2. Statistical Methods — An Introductory Text; Jyoti Prasad Medhi, New Age
International Publishers, New Delhi - 110002.
3. Statistics; E. Narayanan Nadar, PHI Learning Private Limied, New Delhi - 110012.
4. Quantitative Methods—Theory and Applications; J.K. Sharma, Macmillan
Publishers India Ltd., New Delhi - 110002.

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